Description
res_pjsip_t38 in Sangoma Asterisk 15.x before 15.7.4 and 16.x before 16.5.1 allows an attacker to trigger a crash by sending a declined stream in a response to a T.38 re-invite initiated by Asterisk. The crash occurs because of a NULL session media object dereference.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | asterisk | 1:16.10.0~dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | asterisk | No fix yet | — |
| Ubuntu 18.04 LTS | asterisk | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | asterisk | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | asterisk | 16.5.1-r0 | — |
| Alpine v3.23 | asterisk | 16.5.1-r0 | — |
| Alpine v3.22 | asterisk | 16.5.1-r0 | — |
| Alpine v3.21 | asterisk | 16.5.1-r0 | — |
| Alpine v3.20 | asterisk | 16.5.1-r0 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | asterisk | 16.5.1-r0 | — |
| Alpine v3.18 | asterisk | 16.5.1-r0 | — |
| Alpine v3.17 | asterisk | 16.5.1-r0 | — |
| Alpine v3.16 | asterisk | 16.5.1-r0 | — |
| Alpine v3.15 | asterisk | 16.5.1-r0 | — |
| Alpine v3.14 | asterisk | 16.5.1-r0 | — |
| Alpine v3.13 | asterisk | 16.5.1-r0 | — |
| Alpine v3.12 | asterisk | 16.5.1-r0 | — |
| Alpine v3.11 | asterisk | 16.5.1-r0 | — |
| Alpine v3.10 | asterisk | 16.3.0-r2 | — |
| Alpine v3.9 | asterisk | 15.7.4-r0 | — |
| Alpine v3.8 | asterisk | 15.6.2-r0 | — |
| Alpine v3.7 | asterisk | 15.6.2-r0 | — |
References
- http://packetstormsecurity.com/files/154371/Asterisk-Project-Security-Advisory-AST-2019-004.html
- http://downloads.asterisk.org/pub/security/AST-2019-004.html
- 20210304 AST-2021-006: Crash when negotiating T.38 with a zero port mailing-list
- http://packetstormsecurity.com/files/161671/Asterisk-Project-Security-Advisory-AST-2021-006.html